Demography

Biology

Animal science

Fat mass

Endocrinology

Body mass index

Basal metabolic rate

Fat free mass

Resting energy expenditure

Doubly labeled water

Body weight

Physical therapy

Internal medicine

Sociology

Kilogram

Energy expenditure

Medicine

Chemistry

Physical activity

American Journal of Clinical Nutrition

Physical activity may be a way to increase and maintain fat-free mass (FFM) in later life, similar to the prevention of fractures by increasing peak bone mass.

Physical activity and fat-free mass during growth and in later life